28990720
28,990,720 is an even composite number composed of five prime numbers multiplied together.
28990720 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 28990720:
28 × 5 × 11 × 29 × 71
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 11 × 29 × 71)See below for interesting mathematical facts about the number 28990720 from the Numbermatics database.
Names of 28990720
- Cardinal: 28990720 can be written as Twenty-eight million, nine hundred ninety thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 2.899072 × 107
Factors of 28990720
Divisors of 28990720
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 4 5 8 10 11 16 20 22 29 32 40 44 55 58 64 71 80 88 110 116 128 142 145 160 176 220 232 256 284 290 319 320 352 355 440 464 568 580 638 640 704 710 781 880 928 1136 1160 1276 1280 1408 1420 1562 1595 1760 1856 2059 2272 2320 2552 2816 2840 3124 3190 3520 3712 3905 4118 4544 4640 5104 5680 6248 6380 7040 7424 7810 8236 9088 9280 10208 10295 11360 12496 12760 14080 15620 16472 18176 18560 20416 20590 22649 22720 24992 25520 31240 32944 37120 40832 41180 45298 45440 49984 51040 62480 65888 81664 82360 90596 90880 99968 102080 113245 124960 131776 164720 181192 199936 204160 226490 249920 263552 329440 362384 408320 452980 499840 527104 658880 724768 905960 999680 1317760 1449536 1811920 2635520 2899072 3623840 5798144 7247680 14495360 28990720
- Sum of all divisors σ(n): 79470720
- Sum of proper divisors (its aliquot sum) s(n): 50480000
- 28990720 is an abundant number, because the sum of its proper divisors (50480000) is greater than itself. Its abundance is 21489280
Bases of 28990720
- Binary: 11011101001011101000000002
- Hexadecimal: 0x1BA5D00
- Base-36: H9DDS
Squares and roots of 28990720
- 28990720 squared (289907202) is 840461846118400
- 28990720 cubed (289907203) is 24365594051501621248000
-
The
square root of 28990720 is 5384.3031118243 -
The
cube root of 28990720 is 307.1989076929
Scales and comparisons
How big is 28990720?- 28,990,720 seconds is equal to 47 weeks, 6 days, 12 hours, 58 minutes, 40 seconds.
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To count from 1 to 28,990,720 would take you about nineteen weeks!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 28990720 cubic inches would be around 25.6 feet tall.
Recreational maths with 28990720
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